This is the moment a job attacked a dog trainer as he walked his greyhound to the trap at a racecourse.<br /><br />A shocking video shows the fuming racing fan running up to the handler from behind before jumping on his back at Crayford Greyhound Track in South East London.<br /><br />Cops have now arrested the thug on suspicion of causing actual bodily harm.<br /><br />The clip shows the invader thumping the trainer on the head as his greyhound struggles to take cover.<br /><br />The thug then knees the trainer in the face while he holds him by the hood of his jumper.<br /><br />He throws a few more punches before the horrified cameraman pans away from the terrifying scene.<br /><br />The stadium, which has featured races since 1986, is one of just 20 remaining dog tracks in the UK.<br /><br />It has raced five days a week and is owned by Ladbrokes Coral.<br /><br />Racing fans took to Twitter to tell of their shock.<br /><br />One wrote: "I've never seen anything like this. We need some context ASAP."<br /><br />Another added: "I was hoping someone else saw this. Hopefully, the bloke is ok."<br /><br />A third said: "Jesus Christ. Fair play to the person with the two dogs getting the lead and the greyhound out the way ASAP."<br /><br />A spokesperson for Met Police for comment said: "Police were called at 12.36hrs on Wednesday, 25 January to reports of an assault at commercial premises in Stadium Way, Crayford.<br /><br />"A man (no further details) was arrested on suspicion of causing actual bodily harm."<br /><br />A spokesperson for Ladbrokes told The Sun: “This was a deeply unsavory incident and one the police are now dealing with.<br /><br />"Our prime concern is the well-being of the individual who was the victim of this awful assault.<br /><br />"We are making sure he is okay, which fortunately he seems to be, whilst also assisting the police with their investigation."<br /><br />Crayford Greyhound Track refused to comment when approached by The Sun.
